Ability to survive and reproduce under conditions that differ from their optimal conditions
Positional tolerance is the total permissible variation in a location of a feature about its theoretically exact location with respect to the datum.
survival
Block means a brick
He is the symbol for Helium in a scientific setting.
A light that is caused by the sun
if by zero tolerance you mean that if the timing goes the valves will get bent then yes it is ^ that is wrong Non Interference is that term and your engine IS NON INTERFERENCE !!
Cleavage is a term referring to how a crystal cleaves, that is, fractures when struck.
something about matter color and mass
If you mean changes, it's acceleration.
Internal, usually relating to the body or an organ.
Agnostic
The scientific term is 'strata'.